26431262647 has 2 divisors, whose sum is σ = 26431262648. Its totient is φ = 26431262646.

The previous prime is 26431262603. The next prime is 26431262651. The reversal of 26431262647 is 74626213462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26431262647 - 2⁷ = 26431262519 is a prime.

It is a super-2 number, since 2×26431262647² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26431242647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13215631323 + 13215631324.

It is an arithmetic number, because the mean of its divisors is an integer number (13215631324).

Almost surely, 2^26431262647 is an apocalyptic number.

26431262647 is a deficient number, since it is larger than the sum of its proper divisors (1).

26431262647 is an equidigital number, since it uses as much as digits as its factorization.

26431262647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 43.

The spelling of 26431262647 in words is "twenty-six billion, four hundred thirty-one million, two hundred sixty-two thousand, six hundred forty-seven".